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<title>Galois multiplication</title>
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<p><font face="Verdana"><font size="2">For Galois multiplication, we will use well 
known formula:</p>
log(x*y) = log(x) + log(y), e.g. <br>
x*y = antilog( log(x) + log(y))
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<p>First, we will build exponent and logarithm tables, using one of generators 
and <u>slow version</u> of algorithm (button GenExpTable). </p>
<p>After that, we can use <u>fast version</u> for Galois multiplication, as 
follows: <br>
...<br>
...<br>
s := ltable[a] + ltable[b]; <br>
s := s mod 255;<br>
s := exptable[s];<br>
...</p>
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